My current hardware inventory:
SuperMicro SC216
SuperMicro 847
19x 1.6TB SATA Intel 3500
20x 10TB SATA HGST
Current setup:
Synology 12 bay NAS
6x 10TB SATA HGST BRTFS Raid6
16TB of use
My plan is to move 8TB of storage to a RAIDzN setup on the Intel SSD drives. I will also add numerous VMs to the JBOF. I expect to stay under 16TB of space on the JBOF. My expectation is to consume around 40-60TB on the HGST JBOD.
Now the confusion has started. I have read so many articles and posts about 'best practices' that I feel I have entered analysis paralysis.
1. How do you begin to determine drive setups based on drive profiles? How do account for drives when you are looking at 2/4/8/10/14TB and potentially larger drives? At what point in drive size do you say we need to move to RAIDz3 or run RAID60?
2. What is a safe setup for platters and in what quantity? e.g. Is an 8x drive RAIDz2 the standard or does that change based on drive size, cache, SATA vs SAS, and what if a drive is SMR or not SMR... how do you begin to factor all of that?
3. Does the triad of performance, capacity and integrity change when you move to flash storage? Does it change again if using enterprise flash?
4. Does the use of a hot spare change with drive types? My guess would be there is not an issue leaving a hot spare flash drive but I do not think it would be a good practice to leave a platter SATA drive in a hot standby mode.
# I had posted the above on another forum. After reading Introduction to ZFS I think I can answer a few of my questions but still unsure.
It seems like 8 drive in Raidz2 is pretty good for performance and a 9 drive Raidz3 for better integrity.
I was under the impression that power on hours for rotational drives will degrade the drive over time so I am skeptical about a hot spare platter.
Could not find any data relating to SMR but drive sizes over 6TB should always be mirrored or raidz2/3.
Could not find any data that directly addresses flash storage.
SuperMicro SC216
SuperMicro 847
19x 1.6TB SATA Intel 3500
20x 10TB SATA HGST
Current setup:
Synology 12 bay NAS
6x 10TB SATA HGST BRTFS Raid6
16TB of use
My plan is to move 8TB of storage to a RAIDzN setup on the Intel SSD drives. I will also add numerous VMs to the JBOF. I expect to stay under 16TB of space on the JBOF. My expectation is to consume around 40-60TB on the HGST JBOD.
Now the confusion has started. I have read so many articles and posts about 'best practices' that I feel I have entered analysis paralysis.
1. How do you begin to determine drive setups based on drive profiles? How do account for drives when you are looking at 2/4/8/10/14TB and potentially larger drives? At what point in drive size do you say we need to move to RAIDz3 or run RAID60?
2. What is a safe setup for platters and in what quantity? e.g. Is an 8x drive RAIDz2 the standard or does that change based on drive size, cache, SATA vs SAS, and what if a drive is SMR or not SMR... how do you begin to factor all of that?
3. Does the triad of performance, capacity and integrity change when you move to flash storage? Does it change again if using enterprise flash?
4. Does the use of a hot spare change with drive types? My guess would be there is not an issue leaving a hot spare flash drive but I do not think it would be a good practice to leave a platter SATA drive in a hot standby mode.
# I had posted the above on another forum. After reading Introduction to ZFS I think I can answer a few of my questions but still unsure.
It seems like 8 drive in Raidz2 is pretty good for performance and a 9 drive Raidz3 for better integrity.
I was under the impression that power on hours for rotational drives will degrade the drive over time so I am skeptical about a hot spare platter.
Could not find any data relating to SMR but drive sizes over 6TB should always be mirrored or raidz2/3.
Could not find any data that directly addresses flash storage.